Three scripture verses have encouraged me to "keep keeping on" when I've been ready to "pack it in". The verse shown below (Galatians 6:9), Hebrews 6:10 and 1 Corinthians 15:58 have all been such an encouragement!
Frustrated, discouraged, perplexed? "Fix your eyes on Jesus." - Hebrews 12:2
Fellow pilgrim, don't give up! You will reap a bountiful harvest if you "faint not!"