As soon as you think that you have succeeded in a certain thing, the adverse forces make it a point to attack and spoil it. Moreover, when you think of success, you relax your aspiration and the slightest relaxation is sufficient to spoil the game. The best thing is not to think of it but to go on doing your duty. But sometimes when you go on thinking of your short-comings and failures and you get depressed, then you have to put the success before your nose and say, “Look at this.”
Ref : Words of The Mother Vol. III