trust, tree, thoughts?

hey.. i am preaching sunday. its been a few months since i the last time i preached, so i am a bit nervous and having trouble consolodating my thoughts. maybe you can help? yes, you. its the baptism service for matze (two posts ago). i am honored that he badgered me into the sermon. and i chose his baptism verse (we dont do that in the states, do we? i like the tradition!) it's Jeremiaha 17:7-8...

“But blessed is the man who trusts in the Lord,
whose confidence is in him.
He will be like a tree planted by the water
that sends out its roots by the stream.
It does not fear when heat comes;
its leaves are always green.
It has no worries in a year of drought
and never fails to bear fruit.”