The planting of worry in the mind of another is heartless, cruel, unkind and selfish.
Another question naturally arises: If this course of action is selfish, and the worrier really desires to be unselfish, how can he control his worry, at least so as not to communicate it to another?
The answer also is clear.
Let him put a guard upon his lips, a watch upon his actions.

Let him say to himself: Though I do not, for my own sake, care to control the needless worries of my life, I must not, I dare not curse other lives with them.

Hence I must at least keep them to myself--I must not voice them, I must not display them in face, eyes or tone.
Then there is the mother who worries over her child's clothing.

She is never ceasing in her cautions.

It is "don't, don't, don't," from morning to night, and whether this seems "nagging" to her or not, there would be a unanimous vote on the subject were the child consulted as to his feelings.