Deeds without sincerity are like a traveller who carries dirt in his water jug. The carrying of it burdens him, and it brings no benefit.
Say what is true, although it may be bitter and displeasing to people [Baihaqi] - Nabi Muhammad SAW
It is better for a man to give one dirham as Sadqa during his lifetime than to give a hundred at the time of his death. (Abu Dawud).
No deed is lighter than dhikr, richer in taste and more pleasing to the heart than dhikr. (Ibn al-Qayyim)