Portugal was originally only concerned about establishing forts and trading posts so as to protect the sea route to Asia. As time progressed, they began to see the benefit of establishing more permanent settlements. These permanent settlements would result in the expansion of their political influence. The exploration idea of God, Glory, and Gold also fit. The more permanent settlements would allow the Portuguese missionaries to also further expand and share their beliefs with the African Peoples.
There are several reasons why Portugal was interested in establishing colonies in Africa. The main reason was the fact that gold was so abundant in many regions of the continent. King John I wanted to gain access to the gold-producing areas of West Africa. Moreover, the Portuguese also wanted to profit from the very successful trans-Saharan trade routes between Songhay and North Africa. Portugal also wanted to bring Christianity to the continent, as they believed this was the only true religion and the only way to achieve "salvation."
