When it is time to pray

"When we try to come to God, the enemy will whisper, it is of no use for you to pray; did not you do that evil thing? Have you not sinned against God and violated your own conscience? When we feel that we cannot pray,it is then the time to pray." Thoughts From the Mount of Blessing p.115 E.G.W.

The LORD is righteous; for I have rebelled against his commandment: hear, I pray you, all people, and behold my sorrow:  Lamentations 1:18