Your search for "Pessimism leads to weakness, optimism to power. - William James 1842 - 1910" revealed the following:

S2T- Act as if what you do makes a difference. It does. - William James 1842 - 1910

S2T- Act as if what you do makes a difference. It does. - William James 1842 - 1910 - blkshrt

RW-3.8 - Act as if what you do makes a difference. It does. - William James 1842 - 1910

PWK-3.8-Act as if what you do makes a difference. It does. - William James 1842 - 1910

YT-3.8- Act as if what you do makes a difference. It does. - William James 1842 - 1910

PWB-3.8- Act as if what you do makes a difference. It does. - William James 1842 - 1910

MW-3.8- Act as if what you do makes a difference. It does. - William James 1842 - 1910 - Drink Wisely in MugWisdom - Ceramic 11oz cup