This poem I found and it has helped me through some depression issues recently.
"Purpose"
I live for those who love me,
for those who know me true;
For heaven that smiles above me,
and awaits my spirit too.
For the cause that lacks assistance,
for the wrong that needs resistance,
For the future in the distance,
and all the good that I can do.
By G.L. Banks "My Aim"