Psalms 66:17-19

I cried aloud to Him; He was highly praised with my tongue. If I regard sin and baseness in my heart [that is, if I know it is there and do nothing about it], The Lord will not hear [me]; [Prov 15:29; 28:9; Is 1:15; John 9:31; James 4:3] But certainly God has heard [me]; He has given heed to the voice of my prayer.