By exploring simple problems, we begin to build up experience with how to tackle commonly occurring tasks. When faced with larger problems it will usually be possible to break the full task down into smaller components, many of which match similar tasks that we have seen before. This enables us to concentrate our energies on solving the new elements of the problem at hand. As we tackle more and more problems, and find solutions to them, we accumulate further experience and increase both the likelihood that we will be able to solve future problems, and our confidence in our ability to do so.