The exchangeable value of all commodities, rises as the difficulties of their production increase.
No difficulty can discourage, no obstacle dismay, no trouble dishearten the man who has acquired the art of being alive. Difficulties are but dares of fate, obstacles but hurdles to try his skill, troubles but bitter tonics to give him strength; and he rises higher and looms greater after each encounter with adversity.
Difficulties — quotes and aphorisms
The battle of life is, in most cases, fought uphill; and to win it without a struggle were perhaps to win it without honor. If there were no difficulties there would be no success; if there were nothing to struggle for, there would be nothing to be achieved.
Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
Patience and perseverance have a magical effect before which difficulties disappear and obstacles vanish.
No matter what kind of challenges or difficulties or painful situations you go through in your life, we all have something deep within us that we can reach down and find the inner strength to get through them.