endless numbered days

I feel this every day, but some days I feel it more than others:

"For it is true we can seldom help those closest to us. Either we don't know what part of ourselves to give or, more often than not, the part we have to give is not wanted. And so it is those we live with and should know who elude us. But we can still love them - we can love completely without complete understanding." - Norman Maclean

Sometimes my heart feels so full and at the same time so useless.