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
Don't bring your set of rules in a foreign monastery
Another's soul is darkness.
Hurry to much and you will make people laugh.
Get your sleigh ready in summer and your (horse-drawn) cart in winter.
You can't spoil the porridge with butter.
We got what we fought for.
Crowded, but not aggrieved.
In a quiet whirlpool, demons live.