The great and invigorating influences in American life have been the unorthodox: the people who challenge an existing institution or way of life, or say and do things that make people think. - William O. Douglas
I like manual labor. Whenever I've got waterlogged with study, I've taken a spell of it and found it spiritually invigorating. - W. Somerset Maugham
As it is for a person, so it is for a company: having a sense of purpose is invigorating and motivating. - Jon Miller
It is both relaxing and invigorating to occasionally set aside the worries of life, seek the company of a friendly book...from the reading of 'good books' there comes a richness of life that can be obtained in no other way. - Gordon B. Hinckley