Wow...I think that could be asked as 1-1/2 months, as opposed to 1-1/2 years. Maybe I'm open-minded, or maybe I just have a natural "connection" to aikido, but even after the first few weeks of training I found myself applying the mental/philosophical side to my life. And at my last doctor's visit my blood pressure was significantly lower. Conincidence? Maybe. But Ive only been training 5 months, and I feel myself being influenced by the non-physical side of aikido already.
Use the 4 basic points of aikido in everyday life, and it should make a huge difference in it.