Critical comments by students should be taken in a friendly spirit， accumulation of material should not stifle the student’s independence.
对来自学生的批评应该本着友好的精神来接受，学习材料的积累不应该扼杀学生的独立性。
Profit that depletes the planet is no profit at all.
Life is too short to waste time on negativity.
Immature poets imitate; mature poets steal.
自然界无处可憎或卑劣，而是处处令人赞叹且无穷无尽。