On the whole, God’s love for us is a much safer subject to think about than our love for Him. Nobody can always have devout feelings: and even if we could, feelings are not what God principally cares about. Christian Love, either towards God or towards man, is an affair of the will.
 C. S. Lewis, Mere Christianity (1952). copy citation

add
Author C. S. Lewis
Source Mere Christianity
Topic love God
Date 1952
Language English
Reference
Note Adapted from a series of BBC radio talks made between 1942 and 1944
Weblink https://www.dacc.edu/assets/pdfs/PCM/merechristianitylewis.pdf

Context

“The answer is the same as before. Act as if you did. Do not sit trying to manufacture feelings. Ask yourself, ‘If I were sure that I loved God, what would I do?’ When you have found the answer, go and do it.
On the whole, God’s love for us is a much safer subject to think about than our love for Him. Nobody can always have devout feelings: and even if we could, feelings are not what God principally cares about. Christian Love, either towards God or towards man, is an affair of the will. If we are trying to do His will we are obeying the commandment, ‘Thou shalt love the Lord thy God.’ He will give us feelings of love if He pleases. We cannot create them for ourselves, and we must not demand them as a right.” source