Charles H. Spurgeon on Psalms 91:14

Here we have the Lord himself speaking of his own chosen one. Because he hath set his love upon me, therefore will I deliver him. Not because he deserves to be thus kept, but because with all his imperfections he does love his God; therefore not the angels of God only, but the God of angels himself will come to his rescue in all perilous times, and will effectually deliver him. When the heart is enamoured of the Lord, all taken up with him, and intensely attached to him, the Lord will recognise the sacred flame, and preserve the man who bears it in his bosom. It is love, —love set upon God, which is the distinguishing mark of those whom the Lord secures from ill. I will set him on high, because he hath known my name. The man has known the attributes of God so as to trust in him, and then by experience has arrived at a yet deeper knowledge, this shall be regarded by the Lord as a pledge of his grace, and he will set the owner of it above danger or fear, where he shall dwell in peace and joy. None abide in intimate fellowship with God unless they possess a warm affection towards God, and an intelligent trust in him; these gifts of grace are precious in Jehovah's eyes, and wherever he sees them he smiles upon them. How elevated is the standing which the Lord gives to the believer. We ought to covet it right earnestly. If we climb on high it may be dangerous, but if God sets us there it is glorious.