Each thought that we create, every word we speak and every action we perform, are responsible for the radiation of non-physical energy or vibration into the universe including other people, the surroundings or the atmosphere as well as to physical nature.
A very important aspect of our consciousness, which influences the quality of this vibration, is the intention or hidden meaning behind each thought, word and action. When the intention is pure, positive and unconditional, positive vibrations of the energy of peace, love, good wishes, happiness and truth get transmitted.
People who experience these positive energy vibrations from us are reminded of their personal positive qualities, even if these qualities are different from ours, and get inspired to imbibe the same and put them into practice, although this may not even be our conscious intention in the first place, but we just have a general pure, positive, intention towards everything and everyone around us.
But, this giving of inspiration happens automatically. On the other hand, when the intention is negative and impure, it is as if we bring other people, surroundings and nature down, i.e., in a way, we draw and absorb positive energy from these entities, instead of filling them.