Thought creates lasting bonds between human beings; love and hatred enchain certain individuals to one another for a whole series of incarnations; many a victim of the past is to be found again in those unnatural sons who send a thrill of horror through society when it hears of some heinous crime--they have become the torturers of their former oppressors. In other cases, it is love which attracts and unites in renewed affection those who formerly loved one another--they return to earth as brothers, sisters, fathers, mothers, husbands or wives. But if we are the slaves of the past, if fate compels us to reap what we have sown, we yet have the future in our hands, for we can tear up the weeds, and in their place sow useful plants. Just as, by means of physical hygiene, we can change within a few years the nature of the constituents that make up our bodies, so also, by a process of moral hygiene, we can purify our passions and then turn their strength in the direction of good. According as we will, so do we actually become, good or bad; every man who has taken his evolution in hand notices this rapid transformation of his personality, and sees his successive "egos" rise step by step, so to speak, throughout his whole life. Speaking generally, the first part of life is the expression of the distant past--of former lives--the second is a mixture of the past and of the energies of the present incarnation; the end of life is nothing but a sinking into an ever-deepening rut for those who crystallise in only one direction; the force of habit sets up its reign, and man finds himself bound by the chains he himself has forged. This is the reason an old man does not like the present times; he has stopped whilst time has advanced, and he is now being carried along like the flotsam and jetsam of a wreck; the very tastes and habits of his contemporaries violently clashing with his beloved past. Speak not to him of progress or evolution, he has brought himself into a state of complete immobility, and he will discover no favourable field of action nor will he acquire real energy until he has drunk of the waters of Lethe in a rest-giving Hereafter and a new body supplies his will with an instrument having the obedient suppleness of youth. H. P. Blavatsky, in the _Secret Doctrine_, has well described this progressive enmeshing of man in the net he himself is weaving.