Charles H. Spurgeon on Psalms 86:4

Rejoice the soul of thy servant, etc. As I have not found rest in anything created, I have raised up my soul on the wings of thought and desire to thee my Creator. Love bears one's soul up; and it has been truly said, that the soul is more where it loves, than where it actually is. Thought and desire are the wings of love; for he that loves is borne on to, and abides in, what he loves, by thinking constantly on, and longing for, the object of his love. Whoever truly, and from his heart, loves God, by thinking on him and longing for him lifts up his soul to God; while, on the contrary, whoever loves the earth, by thinking on and coveting the things of the earth, lets his soul down to its level. —Bellarmine.