Be more guarded in your speech. You are in a special position and one of great trust and whatever you say is taken up and commented on, so you must be careful that nothing should go out from you which ought not to be said or known. To talk less and not be too unguarded in your speech should be part of your discipline of sadhana.
– Sri Aurobindo to Champaklal
Ref: Champaklal Speaks