Time marches on saying
Time keeps passing.
We all grew up as time marches on.
My hometown is very different now. Time marches on.
You have to know that time marches on; nothing can stay the same forever.
To encounter bad luck, or being picked doing something undesirable
White lie
To tell someone the truth about something that they had not understood or received false information
One needs to understand the basic techniques or primary details of something before taking actions that require greater skills
Peter failed because he did not learn to walk before he ran.