To attain knowledge, learn continuously. To become wise, observe continuously.

In my opinion, the author-level metric can distort a real author's citation impact. For example, an author who has an h-index = 2 obtained on the basis of two published papers of which each is cited twenty times is more influential than an author who has an h-index = 3 obtained on the basis of three published papers of which each is cited three times.

The best advice will come from the person who has no personal interest in the matter.

Kids, no matter how big your problems are – ask your parents for help and advice.

Do your best to learn more to be able to act better.

It is impossible to avoid failures in life. Don't be afraid of them. Consider rather how to learn from your own failures.

Sometimes people think the old days were better than today. Even though life was simpler and slower, it was not necessarily easier.

A happy man doesn't reconsider life.

We should enjoy every minute we live today because who knows if we will have a chance to do so tomorrow.