The role of doubt in knowledge in Augustine

No doubt that the goal of every Christian to know God, any knowledge of 
happiness that is not matched by other's happiness. So it was only natural 
that there will be many questions about how this knowledge, so we 
searched topic came entitled '' the role of Doubt in knowledge at 
Augustine", where this research focused on the issue of handling 
problematic Augustine certainty, can achieve certainty or is it a matter for 
doubt? And if possible what is the Method that follow -Augustine to 
reach its goals?
And that's what we saw through the monitoring of the most important 
stages of doubt in the course of its intellectual formation and its search 
for truth. Where the truth value of high Augustin is tries to reach up to a 
certainty. Through these stages found him in front of Christian doctrine 
that guided them and which served as the entrance to the idea and its 
foundation of knowledge and certainty which came through his response 
to academics and access to the possibility of knowing the certainty, and 
dealt with the theory of illumination and the value of intuition in building 
knowledge.