A man’s ethical behaviour should be based effectually on sympathy, education, and social ties, no religious basis is necessary. Man would be indexed in a poor way if he had to be restrained by fear of punishment and hope of reward after death.
When you keep saying you are busy, then you are never free. When you keep saying you have no time, then you will never have time. When you keep saying that you will do it tomorrow, then your tomorrow will never come.