In old age, the period from 66 to 75, all of the drives are no longer maintained in one-one correspondence with the needs. In the case of the need to drink and eat they are but not in the case of the need for sex, for with sex need persists in the absence of the drive. Most old people do not lead a very active sex life where they lead any, but the need exists even though it be of low intensity. Among the secondary needs, the need to know has been greatly reduced. Its place will be usurped by another function, to be discussed presently. In old age the individual is content to get along with such knowledge as he has acquired earlier, and there is no great urge to increase it. The same can be said for the need to do; in old age muscular activity slows down more decisively than the other drives, and violent activity is for the most part eliminated altogether. With the last of the secondary drives, the need to survive, there has been an increase in intensity and it often happens that in old age the individual comes to rely increasingly on it. The need here is matched by the drive. The drive to survive substitutes for the short-range self of the primary needs the long-range self of the secondary, and for immediate survival ultimate survival.