Help when neccessary

• Help others when you are  feeling well.
• Help others when you are free from burdens of task. 
• Help others who are willing to accept your help.
• Help others when they are worthy of your  help.

Conclusion: One should only help when others require your assistance and are willing to accept your help and must be deemed as deserving to be helped.

1)Do not help others when you are not feeling well.
2)Do not help others when you are already preoccupied with a lot of tasks and have deadline to meet.
3)Do not help others who are not willing to accept your help.
4)Do not help others when they do not deserve your help.

Unless it is  an emergency, one can ignore the above 4 rules and aid/help the person in need.