All About Bharatiya Sanatana Dharmam otherwise known as Hinduism : Ch-5..3.3
CHAPTER- 5. HINDU TENETS-3.
3.The Working Of The Law-3
Thought moulds your character. If you entertain noble thoughts, you will develop a noble character; and if you entertain evil thoughts, you will develop a base character. This is the immutable Law of Nature.
Therefore, you can deliberately shape your character by cultivating sublime thoughts. Thought materialises and becomes an action. If you allow the mind to dwell on good, elevating thoughts, you will do naturally good and laudable actions.
Conduct or behaviour reveals your character. Conduct also moulds your Character. Cultivation of good conduct needs rigorous discipline and constant vigilance. You will have to watch every thought, word and action.
You must be extremely careful when you conduct yourself with others. With all your good intentions, you will be carried away by the force of your previous wrong impressions, instincts and impulses. Even highly educated people lack in behaviour.
Good behaviour indicates that you have a refined or polished, disciplined mind and real, good spiritual culture. The practice of Japa, Pranayama and Mauna (or vow of silence) will help you to control the impulses etc.
You sow an action and reap a habit. You sow a habit and reap a character. You sow a character and reap your destiny. Hence, destiny is your own make-up. You have built it. You can undo it by entertaining noble thoughts, and doing virtuous actions, and changing your mode of thinking.
Now you are thinking that you are the body, Mr. So and so. Now, start the anti-current of thought. Think that you are all-pervading, immortal Brahman. Brahman you will become. This is an immutable Law.