Thoughts are the seed for any existing situation. Happiness-sorrow, success-un success, progress-regress etc depends on man's own thoughts.
By working on thoughts - it is possible to awaken the divinity in human and bring heaven on earth. Pt. Shriram Sharma Acharya has visualized this, and hence focus of the mission is changing the individual's thought.
Thoughts have impacts on character.
Thought --> Words --> Karma/Action --> Habits --> Sanskaar/Firm Habits --> Character
Have close eye on your thoughts cause one day they become Words. The Words will appear in actions, and actions will become Habits. Watch the Habits as they will be stored in mind very firmly & becomes Sanskaars. These Sanskaars build Character.