Chanakya — Indian Politician

Chanakya (IAST: Cāṇakya;  pronunciation (help·info); 350 – 275 BCE) was an Indian teacher, philosopher, economist, jurist and royal advisor. He is traditionally identified as Kautilya or Vishnu Gupta, who authored the ancient Indian political treatise, the Arthashastra (Economics). As such, he is considered as the pioneer of the field of political science and economics in India, and his work is thought of as an important precursor to classical economics. His works were lost near the end of the Gupta Empire and not rediscovered until 1915... (wikipedia)

Before you start some work, always ask yourself three questions - Why am I doing it, What the results might be and Will I be successful. Only when you think deeply and find satisfactory answers to these questions, go ahead.
He who is overly attached to his family members experiences fear and sorrow, for the root of all grief is attachment. Thus one should discard attachment to be happy.
Education is the best friend. An educated person is respected everywhere. Education beats the beauty and the youth.
The biggest guru-mantra is: never share your secrets with anybody. It will destroy you.
Once you start a working on something, don't be afraid of failure and don't abandon it. People who work sincerely are the happiest.