Well done is better than well said.
Never complain and never explain.
It's always too early to quit.
To know oneself, one should assert oneself.
Go for it now. The future is promised to no one.
Do not weep do not wax indignant. Understand.
The wise does at once what the fool does at last.
Without hard work, nothing grows but weeds.
Begin to be now what you will be hereafter.
Be kind whenever possible. It is always possible.
All science is either physics or stamp collecting.