I think the existence of God is relative to the individual who perceives the idea of God. The argument of creation in my mind remains an eternally powerful one - if you justify the creation of the world by a single, arbitrary and systematic event such as the Big Bang (which in itself may or may not have had a causation - but which is, in this instance, irrelevant) than such an argument does not elucidate the creation or existence of the universe which preceded the occurrence of the Big Bang. Hence the universe itself must have been created by something greater than ourselves.
The worship of a God who takes human form is again relative to humanity's need to feel themselves inexorably linked to a force of greatness which surpasses our own restricted existence. Thus we impose the human form on a force which may or may not be so and which may exist outside ourselves, "looking down from Heaven" or which may in fact form a duality through an existence both outside and within one's self. That is if we accept the notion of a God and "His" role in creation of the world that one should likewise accept that the act of creation is in a strange way a manifestation of "His" greatness, and thus every tree or rock or animal or human being is a infinite and yet a minute part of God.
I don't know whether I can explain my view of God but I do know that I have no intention to evangelize, because I believe that an individuals' views of God are relative to their existence, context and circumstances. The same can be said of an individual's choice of worship - some previous posts have questioned the role of the Church, of the need to worship God and prey to "Him". I cannot claim knowledge on behalf of other Christian denominations but due to my cultural background I can respond personally from an Orthodox perspective. Orthodoxy preaches that the role of the Church is as a vehicle of faith, i.e. it bears no linkage to God directly, rather it is a place where individuals may peacefully worship and pray. The role of the clergy and Church itself is thereby insignificant other than as a method of support for those seeking to discover their unique connection in their attempts to discern God within society, history and within one's self. In reference to worship and prey I offer only this - that no individual assigns nor abrogates the necessity for such an act, rather it is a means of moulding and re-discovering one's sense of self within the the existence of God. Jesus thereby preached not for himself to be worshiped, but to let such principles as unity and respect guide every individual. His worship is a result of His greatness. As individuals recognise that any act of martyrdom for a cause greater than themselves invites respect and appreciation.The Bible, (although re-told by the followers of God and of Christ and as such riddled by the bias of the human mind and individual's context) offers, as much as any other religious text, be it the Torah or the Qur'an, fundamental truths and guidelines to life, which are incidentally a reflection of its context.
I hope that answers some of the posts which have ben previously submitted.