You are the architect of your own fate. You are the master of your own destiny. You can do and undo things. You sow an action and reap a tendency. You sow a tendency and reap a habit. You sow a habit and reap your character. You sow your character and reap your destiny. Therefore, destiny is your own creation. You can undo it if you like – destiny is a bundle of habits.
– Swami Sivananda (1887-1963)
There’s not really anything I can add to this that isn’t already there. These words are well worth dwelling upon.