Satan threatens you with the prospect of poverty and bids you to be niggardly, whereas God promises you His forgiveness and bounty; and God is infinite, all-knowing,
Al-Baqara (The Cow) Verse 268
The Prophet used to take care of us in preaching by selecting a suitable time, so that we might not get bored. (He abstained from pestering us with sermons and knowledge all the time).
Sahih Bukhari: Volume 1, Book 3, Number 68