现在当爷爷的人，曾经都当过孙子!把这句翻译成英文是怎么样的？

你好，我给出以下几种翻译：
1.nowaday' father/grandfather/grandpa were yesterday' offspring/son.
2.all the famous person have done things that insignificancy/insignificance
3.everybody have some bad old times.

all current grandpas were once grandsons

Nobody can be powerful from the beginning, they all have been frustrated many times to get this far.