Subconscious mind is the sum total of our past experiences. What we feel, think, or do forms the basis of our experience. These experiences are stored in the form of subtle impressions in our subconscious mind. These impressions interact with one another and give birth to tendencies. We become prone to react in a particular way to a particular situation or stimulus depending upon the tendencies in our subconscious mind. The resultant of these tendencies determines our character. Depending on the strength and nature of their character people respond to the same stimuli or the situation in differing ways. The reaction varies according to the character of the individual.
Let us explain the concept with one example. The hot summer dries up everything, including the weeds, in a farm, and the field appears barren. Apparently there is nothing but black soil. Soon the rains soak the land and the imbedded seeds sprout up and fill the field with unwanted weeds again. The farmer never desired to have them, but when certain conditions were fulfilled the weed came to life. The rain water, the weather, and the seeds were sufficient to cause the weed to appear above the ground. However, the weed did not come with rain-water or from sky, or somewhere else; the weed was always present in the seed form in the soil itself!