Nothing is small or great in God's sight. Whatever He wills becomes great to us, however seemingly trifling; and if once the voice of conscience tells us that He requires anything of us, we have no right to measure its importance.
I chop a lot of onions because I love cooking, and the times where I've never cried chopping onions is when I'm not thinking about it, when I'm talking to someone or I'm listening to music.