With accent marks:
Жизнь прожи́ть – не по́ле перейти́.
To live a life is not the same (not as easy) as to go through a field.
Life is complicated, and living it is not easy. It is a matter of a variety of events and difficulties that a person encounters throughout his or her life.
The closest English equivalent would be "Life is not a bed of roses".
Other Russian proverbs
The forbidden fruit is sweet.
One in the field is not a warrior.
Where there is no fish even a crayfish is a fish.
~ Seven babysitters make the kid to lose an eye.
We don't appreciate what we have but we cry when we lose it.
A bird is visible by its flight.
Forewarned is forearmed.
Do not dig a hole for another one, you will fall into it yourself.