Basically it translates from Hebrew as:
"If G-d is with me
Who can stand against me."
And it's a picture of someone walking through the split sea like in the exodus from Egypt.
G-d can truly make miracles.
What G-d decrees no man can stand against it.
We need to merit G-d's standing with us.
You have to do right, speak right, and have the right intentions.
Only G-d can judge whether we are there!
But how amazing things can be for us if we look to the Heavens and merit G-d being with us.
Then no man can stand against us! ;-)
(Source photo: Tali-Cohen Saban)