I was still a student when a school friend of mine banked her first adult salary as an actuarial assistant. When I finally graduated and reached the dubiously honourable rank of intern, she was already an actuarial consultant, in charge of large contracts.
In medicine you're never certain of whether you've actually made it. When I was adressed as "doctor" on my first call as intern and I had to make potentially life and death decisions as is expected of a real doctor, I assumed the nurse had addressed someone standing behind me. The community and one's family think you've really achieved something great if you're a doctor. There is still much respect for the profession.
Amongst other doctors though, an uncompromising ranking system is strictly observed.
As a meagre little intern, you might just feel a bit chuffed with yourself for making a good diagnosis or performing a procedure well. Your students might gather around you, eager to see the signs you've picked up in your wisdom. Be assured though when you present the case to the registrar, it will transpire that you missed the most important sign and the patient is sick from something completely different than what you had just been describing to the students. A good thing the sister knows best than to trust your diagnoses: she waited for the reg to see the patient before administering the meds. Your prescription would have been completely inappropriate.
But soon the house of cards come down again. The registrar who appeared so knowledgeable and accomplished the night before, is brought to his knees by the consultant on the next morning's ward round. As it turns out, the reg himself had failed to address a vital aspect of the patient's management. What's more, and a seemingly and infinitely graver mistake is that the reg cannot quote the specific study which proves that the patient should have been managed differently from the way the reg elected to manage him. This entire exchange between the registrar and consultant occurs on the grand ward round, in front of the patient (!), the students, interns and other registrars. The reg feels so stupid and wonders whether he shouldn't just go straight back to med school, or possibly quit medicine all together because he obviously knows nothing at all. Now he has to return to the patient and keep treating him. The patient, having heard the entire exchange, believes his doctor is useless and doesn't trust him anymore.
Don't make the mistake of thinking you've finally made it once you yourself are the consultant. Your colleagues are bound to raise their eye brows at some ofthe diagnoses you make, and some of your treatment plans. As you become more specialised in your field your focus narrows and as a consequence you become less adept at treating diseases you don't deal with daily. You might not be able to answer a general medical question posed to you at a dinner party. Your friends don't understand the subtle nuances of your speciality. They just think its great that you're a doctor and as such must know everything.
While my non-medical friends are settled in their careers, safe in the knowledge that they know what they're doing and can, with relative certainty, expect the same results from similar situations on a daily basis, I keep riding the rollercoaster of knowledge. Each day brings the chance of feeling completely out of my depth, too junior and unsure. The only certainty is that one doesn't outgrow that feeling.