While everybody has a belief system (Christian, Islam, Catholic, Buddhist, atheist, agnostic etc) this hasn't always translated into their dealings with money. Many investors, especially those who hold nominal beliefs, would argue that the two, Money and Beliefs, are not congruent and should be dealt with at arm's length.

If you believe that gambling is a bad thing you may not venture to a casino but you may invest in Aristocrat Leisure because it's share price keeps booming. You may not believe in promiscuous lifestyles but it doesn't seem to rate a bleep on the radar when purchasing those Ansell stock options. Or does it? Can our belief structures begin to dictate our investment portfolios and still make solid returns?

Todd Larsen, quoted in this article Investors bet on their faith says,

Investors are finding that they don't have to sacrifice returns to invest with religious values in mind. Some faith-based funds have consistently outperformed the broader market, and performance between screened and unscreened funds is competitive

Could it be possible that what you stand for can actually stand up to the investments that go against your values?