Help people in any way possible in personal capacity and that makes you a better person.
In work be professional and follow all rules/laws etc.
But do not spend time during working hours discussing personal problems and things like that which can detract from work and affect your professionalism.
In no way otherwise should you change your basic helpful nature.
25th September 2018 From India, Pune
Your senior has advised you:
"not to do any personal help (to other colleagues) while in the office premises unless it is required".
When he gave this advice, you could have sought clarification immediately. Unless we understand his mind, it would not be fair to judge his advice.
He is holding posit ion of CFO. Undoubtedly, he must have been the victim of the bad experiences in his past career.
You may go back to him and seek clarification now also.
25th September 2018 From India, Bangalore
To help or not to help colleagues is a personal choice. It must be remembered that we all need help at work from others.
I have tried to help others when asked or even when not asked and I sensed that the person needs assistance. New colleagues need help and guidance.I still remember and thank others who helped me.
It is also a way to bond and creates a conducive working environment.
27th September 2018 From India, Delhi