As the Founder, the Omniscient One, Shakyamuni Buddha said in the Hundreds of Actions Sutra:
“One who always becomes habituated and familiar with nonvirtue will in the future depend on nonvirtue, engage in nonvirtue, and be reborn following nonvirtue again.”
We should relate what Buddha said to the future effect of the virtuous karma we create also. The more we create positive actions, the more happiness we experience from life to life for countless lifetimes. We achieve great, great happiness in the future for hundreds and thousands of lifetimes, as well as ultimate happiness, liberation from samsara, and the fully-understanding omniscient mind by depending on virtue. Therefore please enjoy Dharma happiness all the time.