John Calvin on Matthew 26:46

46. Arise, let us go. By these words he declares that, after having prayed, he was furnished with new arms. He had formerly, indeed, been sufficiently voluntary as to dying; but, when he came to the point, he had a hard struggle with the weakness of the flesh, so that he would willingly have withdrawn from dying, provided that he had been permitted to do so with the good-will of his Father. He, therefore, obtained by prayers and tears (Hebrews 5:7) new strength from heaven; not that he ever hesitated through want of strength, but because under the weakness of the flesh, which he had voluntarily undertaken, he wished to labor anxiously, and with painful and difficult exertion, to gain a victory for us in his own person. But now, when the trembling is allayed, and the fear is subdued, that he may again present a voluntary sacrifice to the Father, he not only does not retire or conceal himself, but cheerfully advances to death.