To be aware of is basically one word together but for more readers of grammar it is sub divided in more than two words, and this by itself has given birth to two opposite meanings all together. In the first one there is a gentle meaning to it where as the other one is basically a warning of some sort and this warning also is granted as a occurrence of a certain calamity of some sort. The first one which rotates around the fact that it is normal speaking here it is a kind of a tender warning for example a mother or a father telling their child when crossing the street to be aware of the different obstacles when crossing the street for that matter and this by itself is something everybody is aware of at the same time there is a warning call attached to it. Here it is basically an emotional concern here. To be aware of is a matter of a serious question that must be avoided under all emotional affairs here, however one has to be careful how to cross carefully all these threats of a human concern here.