Cash can buy, but it takes enthusiasm to sell.

There is no such thing as constructive criticism.

Believe you will be successful and you will.

Remember that other people may be totally wrong. But they don't think so. Don't condemn them. Any fool can do that. Try to understand them. Only wise, tolerant, exceptional people even try to do that.

Criticisms are like homing pigeons. They always return home.

Anyone can do his work, however hard, for one day. Anyone can live sweetly, patiently, lovingly, purely, till the sun goes down. And this is all that life really means.

Is enthusiasm important in selling? Yes, genuine, heartfelt enthusiasm is one of the most potent factors of success in almost any undertaking.