Here all the great ṛṣis looked on the sun as the visible God and held it to be the chief deity of the Gāyatrī mantra. The sun, the moon and the rest, too, serve man in many ways. Without the sun the whole world is darkness! In darkness we cannot do our work. So by the light of the sun we nourish our bodies, enjoy the world and go on carrying out duties of many kinds. When the sun, a god himself, serves man and does him good in so many ways for his uplift, and so raises him, how does man live today? He enjoys every comfort from Prakṛti. Man gets every kind of service done for him by Prakṛti. What gratitude does such a man offer to Prakṛti? What gratitude does he give to God? He himself is forgetting that very God. That is why man falls into sorrows and troubles of many kinds. He takes every pleasure from the world, but the heart to give anything back, either to the world or to the Paramātma, has not grown in him. This is the artificial and cruel deformity of man today. So, first and foremost, we must recognise that we have to understand the truth of Prakṛti, which is special in humanness. When we are taught to do good even to one who harms us, what harm it is to harm one who does us good! So today he is being shaped as a man, but he is not being proved a man. These are the teachings of Prakṛti. That is why Prakṛti itself is our best guru. For Prakṛti keeps teaching us lessons of many kinds. It seeks no reward of any kind. ‘God, God,’ you say; where is He? One man was questioning another: ‘My dear fellow! Who is your father?’ he asked. ‘My father is so-and-so,’ the second man answered. ‘How will you prove he is your father? What is the evidence?’ the first man asked again.