Sri Aurobindo
Letters of Sri Aurobindo
CWSA 35
No Propaganda or Proselytism [6]
It may be said generally that to be overanxious to pull people, especially very young people, into the sadhana is not wise. The sadhak who comes to this Yoga must have a real call, and even with the real call the way is often difficult enough. But when one pulls people in in a spirit of enthusiastic propagandism, the danger is of lighting an imitative and unreal fire, not the true Agni, or else a short-lived fire which cannot last and is submerged by the uprush of the vital waves. This is especially so with young people who are plastic and easily caught hold of by ideas and communicated feelings not their own – afterwards 
the vital rises with its unsatisfied demands and they are swung between two contrary forces or rapidly yield to the strong pull of the ordinary life and action and satisfaction of desire which is the natural bent of adolescence. Or else the unfit ādhāra tends to suffer under the stress of a call for which it was not ready, or at least not yet ready. When one has the real thing in oneself, one goes through and finally takes the full way of sadhana, but it is only a minority that does so. It is better to receive only people who come of themselves and of these only those in whom the call is genuinely their own and persistent.
6 May 1935