The only limit is the one you set for yourself.
The best way to predict the future is to create it.
成功的关键在于敢于思考非传统的想法。
经常静坐思考,来收拢思想;减少饮酒色欲,来清理思想;摒除嗜好情欲,来修养思想;体味古人教训,来警戒思想;悟察至理名言,来明确思想。