What does this mean not failure but low aim is crime?

Answer 1

It means that it is wrong to set yourself goals that are too simple but there is nothing wrong with failing at something that is hard, in other words, there's no shame in failing as long as you failed to achieve a great goal.

To put it another way, setting yourself low standards and goals that can be easily achieved (buy a new car) is wrong but failing to do something great (swim across the Atlantic) is not shameful because you gave it your all and did as much as you could.

A simpler way to say more or less the same thing would be "no one can ask more of you than that you do your best and give it all that you can"

Winston Churchill once said something with essentially the same fundamental meaning "our victories lie not in never falling but in stooping to pick ourselves up each time we do so"

Short answer, it means that it's far worse to do what is easy than it is to fail to accomplish something great, so long as you gave it your absolute best shot.

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Answer 2

This means that it is better to set high goals and fail rather than set low goals and achieve them easily. It suggests that aiming low limits potential and personal growth, making it a 'crime' to not strive for more challenging or ambitious objectives.