Youth is the spirit of persistence-to keep making an effort to grow and to become more capable despite all obstacles. Those who keep striving for improvement remain youthful no matter how old they are. Conversely, those who fail to do so, even if they are young in years, will be old and weak in spirit.
~Daisaku Ikeda

Those who do not advance, fall back...
Those who stop growing are declining...
Living is therefore ceaselessly triumphing.

~Henri Frédéric Amiel

不进步的人是退步。
停止长大的人开始衰退。
活着就是要不断地获得胜利。

You will never find happiness if you don't change yourself from within. Happiness is not something that someone else can give to you. You have to achieve it for yourself. And the only way to do so is by developing your own character and capacity as a human being; by fully maximizing your potential. If you sacrifice your growth and talent for love, you will absolutely not find happiness. True happiness is obtained through fully releasing your potential.
~Daisaku Ikeda

It is important to stay unaffected by the praise and criticism of the world, to stay steadfast when buffeted by the raging waves of jealously around you. Look down in these things from a higher plane, and use them to make yourself a stronger person.
~Daisaku Ikeda

Those who have a firm grasp of the reason and purpose of which they are engaged in a particular undertaking are strong. If this point is firmly established, then your life will be free from confusion. No matter how painful the circumstances, you will not lose heart, but you will be able to keep growing strong and upright.
~Daisaku Ikeda

Those who work hard and undergo many painful struggled grow and develop. Only through hardship are brilliant "gems" forged. Young people have the energy to give their all. When we give our issues before us, we can forge character and build a firm and unshakable life.
~Daisaku Ikeda