This evolution theory is already mentioned. Darwin has taken this from this Vedic knowledge, and he has placed the whole thing in his imaginative way. Otherwise the evolutionary process is mentioned in the Vedic scripture. First of all aquatics, then plants and trees, then insect, then birds, then beasts, then human being. Now, in the human being form, because by gradual process of evolution we have got advance consciousness, the, I mean to say, subject matter is given to us. Now make your choice now again. Nature has given this opportunity whether you want to go the sat-patha or asat-patha; whether you are again wish to go to the cycle of evolution or if you want to make further progress. Further progress means this human form of life you can go to the higher planetary system. Ūrdhvaṁ gacchanti sattva-sthāḥ (BG 14.18). Yānti deva-vratā devān (BG 9.25). Now you can make your choice. You are now civilized, very advanced intelligence. Now whether you want to go to the cycle of evolution again or whether you want to stop this and go to your original position.
These two things are there: sat-patha and asat-patha. If you make further progress this asat-patha, asat, patha asat . . . asat means it will not stay. So if you remain engaged in this bodily business, that is asat. Just try to understand what is asat. Asat means which will not stay. So everyone knows that this body will not stay. It will be ended today, tomorrow, or after hundred years it will be finished. Therefore if you are simply engaged in the bodily concept of life, as people are generally engaged . . . people are thinking, "I am American," "I am Indian," "I am brāhmaṇa," "I am kṣatriya," "I am cat," "I am dog." Every living entity is simply thinking in bodily. That is asat-patha. If we remain on the bodily concept of life, then we are no better than the dogs and cats.