The question whether a wish is desirable or not depends upon our stage of evolution. A person whose evolution is such that he has no wish other than for the needs of his daily life, must not think that he should wish for something higher. If his heart is inclined to that kind of wish he should not worry about it. But if he feels in his heart, 'No, I really cannot wish for this, I can think of something much higher', then he must accept the consequences. And the consequences will be that he will have to go through tests and trials; and if he does not mind this, so much the better.