What does this part of poem mean?

Question:

What does this part of poem mean?

Trust no future,however pleasant!
Let the dead Past bury its dead!
Act, act in the living present,
Heart within, and God overhead!

Best Answer - Chosen by Asker:

No matter how great your future looks there are always going to be drawbacks or problems.
The past is dead, let it go. The dead can't return to make amends.
Act for the here and now, live for the moment, Stop living in the past, look ahead and don't look back.
Have faith and trust in your heart and above all trust in God.