Responding with my "gut" answer. I didn't read all the posts before mine.
As a medical student, I have seen VERY FEW fellow medical students, residents and attending physicians who profess to any faith at all. Same with the rest of the hospital staff. But among everyone there, I think it's the physicians who may be the LEAST concerned with anything related to faith and spirituality. Most of us medical people -- namely, physicians -- don't have much going on, faith-wise. Most also seem to be happy that way
But PATIENTS, on the other hand. Many patients request chaplain services during their hospital stay. One of my first patients as a medical student stopped me and said, "Please pray for me!" Patients are more concerned about faith than we physicians, as a group, are. Patients are the ones who are questioning issues of existence, spirituality, divinity, suffering, and death. They, their families and their communities are the ones who are praying.
If a patient should say to you, "Pray for me!" what will you do? What will you say? How will you respond? And if you say, "I will," are you telling the truth or are you fudging the most appropriate response? If you nod or say you will pray for someone, will you? What if, to that patient, prayer is not insubstantial but very much an action with material results, same as a new medication or clot-busting drugs or a surgical procedure? Is it right, then, to promise it but not to deliver that promise?
Physicians, in general, may hate organized religion, or faith, or Christianity, or proselytization, but if you're in the USA, 90% of people apparently believe in God and even profess to be Christian. These are OUR PATIENTS. It is NOT TRUE that our patients don't want to hear anything about God, or faith, or death and what comes after. It is simply that, as physicians, we don't know enough about faith. We don't know how to address it. Just as I was at a loss and unable to give a HELPFUL answer when a patient asked me, "What kinds of foods are good for cholesterol?" I can give half an answer, or a vague answer, but nowhere near as much as a dietician could give.
Even if we want nothing to do with faith, by that very request, "Pray for me," we have left the safety of evidence-based medicine and entered the realm of the spiritual.
Just as it may be inappropriate to evangelize a patient who doesn't want to hear anything about faith, it may be equally inappropriate to take an attitude of "I want nothing to do with religion" to a patient whose illness is a matter of faith. There are many things physicians should learn more about: cross-cultural communication, empathy, ethics, end of life issues. I think faith -- and sensitive communication with patients about faith, if needed -- should be counted among them.
To answer the original question of how one integrates faith and medicine.... My first piece of advice is simply to make a commitment to continue exploring your faith throughout your medical training. If you went to services before, make an extra effort to continue doing so in medical school. Keep working at it, because the busy-ness of medical training tends to stamp that out of people relatively quickly. If you don't take the initiative to become part of a faith community, it's easy to get isolated and drop out of the picture. Find some like-minded people to talk to from time to time and to explore issues of faith throughout your training.