renewal

• A new lease on life

  To gain a renewed sense of energy, vitality, or purpose after a period of difficulty, decline, or stagnation.

• A breath of new life

  To introduce new energy, ideas, or vitality into something that had become stagnant, dull, or uninspired.

• To rejuvenate

  To restore someone or something to a more youthful, vigorous, or effective state.