On prayer

"Prayer is the very experience of god

We then pray for the departed
That they may receive salvation  so as to remind ourselves of our own death.

It is a sign of love for all men, even when we need prayers of all. We also pray 
to be united with others, 

Jesus said
Verily I say unto you
If ye have faith
And doubt not...........

And also if ye shall have faith, unto move this mountain
""