Wrestling Jacob:

Genesis 32:22 He rose up that night, and took his two wives, and his two servants, and his eleven sons, and crossed over the ford of the Jabbok. 23 He took them, and sent them over the stream, and sent over that which he had. 24 Jacob was left alone, and wrestled with a man there until the breaking of the day. 25 When he saw that he didn’t prevail against him, the man touched the hollow of his thigh, and the hollow of Jacob’s thigh was strained, as he wrestled. 26 The man said, “Let me go, for the day breaks.”
Jacob said, “I won’t let you go, unless you bless me.”
27 He said to him, “What is your name?”
He said, “Jacob”.
28 He said, “Your name will no longer be called Jacob, but Israel; for you have fought with God and with men, and have prevailed.”
29 Jacob asked him, “Please tell me your name.”
He said, “Why is it that you ask what my name is?” He blessed him there.
30 Jacob called the name of the place Peniel*: for, he said, “I have seen God face to face, and my life is preserved.” 31 The sun rose on him as he passed over Peniel, and he limped because of his thigh. 32 Therefore the children of Israel don’t eat the sinew of the hip, which is on the hollow of the thigh, to this day, because he touched the hollow of Jacob’s thigh in the sinew of the hip.

World English Bible, public domain. *Text note - Peniel means “face of God”.

I don't think I understand all this, and I doubt that anyone else understands it fully, either. No doubt there are many who understand this story about Jacob better than I. Did Jacob really wrestle, or was this a dream? Was this a man, an angel, or an appearance of Christ, Himself? If the other wrestler was an angel or Christ, how is it that Jacob apparently wrestled to a draw. Was his opponent letting him win (or tie)? We don't know for sure. My guess is that Jacob needed reassurance that God was with him, and that this experience, whatever it was, cemented that belief in Jacob's mind.

A few chapters later, Jacob showed his commitment to God, and his belief that God was committed to him:

Genesis 35:1 God said to Jacob, “Arise, go up to Bethel, and live there. Make there an altar to God, who appeared to you when you fled from the face of Esau your brother.”

2 Then Jacob said to his household, and to all who were with him, “Put away the foreign gods that are among you, purify yourselves, change your garments. 3 Let’s arise, and go up to Bethel. I will make there an altar to God, who answered me in the day of my distress, and was with me on the way which I went.”

4 They gave to Jacob all the foreign gods which were in their hands, and the rings which were in their ears; and Jacob hid them under the oak which was by Shechem. 5 They traveled, and a terror of God was on the cities that were around them, and they didn’t pursue the sons of Jacob. 6 So Jacob came to Luz (that is, Bethel), which is in the land of Canaan, he and all the people who were with him. 7 He built an altar there, and called the place El Beth El; because there God was revealed to him, when he fled from the face of his brother. 8 Deborah, Rebekah’s nurse, died, and she was buried below Bethel under the oak; and its name was called Allon Bacuth.

9 God appeared to Jacob again, when he came from Paddan Aram, and blessed him. 10 God said to him, “Your name is Jacob. Your name shall not be Jacob any more, but your name will be Israel.” He named him Israel. 11 God said to him, “I am God Almighty. Be fruitful and multiply. A nation and a company of nations will be from you, and kings will come out of your body. 12 The land which I gave to Abraham and Isaac, I will give it to you, and to your offspring after you I will give the land.”

13 God went up from him in the place where he spoke with him. 14 Jacob set up a pillar in the place where he spoke with him, a pillar of stone. He poured out a drink offering on it, and poured oil on it. 15 Jacob called the name of the place where God spoke with him “Bethel”. 

 

Charles Wesley wrote a long (by our standards) hymn about this episode:

Come, O thou Traveler unknown,
Whom still I hold, but cannot see!
My company before is gone,
And I am left alone with Thee;
With Thee all night I mean to stay,
And wrestle till the break of day.

I need not tell Thee who I am,
My misery and sin declare;
Thyself hast called me by my name,
Look on Thy hands, and read it there;
But who, I ask Thee, who art Thou?
Tell me Thy name, and tell me now.

In vain Thou strugglest to get free,
I never will unloose my hold!
Art Thou the Man that died for me?
The secret of Thy love unfold;
Wrestling, I will not let Thee go,
Till I Thy name, Thy nature know.

Wilt Thou not yet to me reveal
Thy new, unutterable Name?
Tell me, I still beseech Thee, tell;
To know it now resolved I am;
Wrestling, I will not let Thee go,
Till I Thy Name, Thy nature know.

’Tis all in vain to hold Thy tongue
Or touch the hollow of my thigh;
Though every sinew be unstrung,
Out of my arms Thou shalt not fly;
Wrestling I will not let Thee go
Till I Thy name, Thy nature know.

What though my shrinking flesh complain,
And murmur to contend so long?
I rise superior to my pain,
When I am weak, then I am strong
And when my all of strength shall fail,
I shall with the God-man prevail.

My strength is gone, my nature dies,
I sink beneath Thy weighty hand,
Faint to revive, and fall to rise;
I fall, and yet by faith I stand;
I stand and will not let Thee go
Till I Thy Name, Thy nature know.

Yield to me now, for I am weak,
But confident in self-despair;
Speak to my heart, in blessings speak,
Be conquered by my instant prayer;
Speak, or Thou never hence shalt move,
And tell me if Thy Name is Love.

’Tis Love! ’tis Love! Thou diedst for me!
I hear Thy whisper in my heart;
The morning breaks, the shadows flee,
Pure, universal love Thou art;
To me, to all, Thy bowels move;
Thy nature and Thy Name is Love.

My prayer hath power with God; the grace
Unspeakable I now receive;
Through faith I see Thee face to face,
I see Thee face to face, and live!
In vain I have not wept and strove;
Thy nature and Thy Name is Love.

I know Thee, Savior, who Thou art.
Jesus, the feeble sinner’s friend;
Nor wilt Thou with the night depart.
But stay and love me to the end,
Thy mercies never shall remove;
Thy nature and Thy Name is Love.

The Sun of righteousness on me
Hath rose with healing in His wings,
Withered my nature’s strength; from Thee
My soul its life and succor brings;
My help is all laid up above;
Thy nature and Thy Name is Love.

Contented now upon my thigh
I halt, till life’s short journey end;
All helplessness, all weakness I
On Thee alone for strength depend;
Nor have I power from Thee to move:
Thy nature, and Thy name is Love.

Lame as I am, I take the prey,
Hell, earth, and sin, with ease o’ercome;
I leap for joy, pursue my way,
And as a bounding hart fly home,
Through all eternity to prove
Thy nature and Thy Name is Love.
 

Thanks for reading!