Skeptics nearly always bring up the term "coincidence" when setting out to disprove the validity of a magickal result, are their arguments justified or just a misunderstanding of the the true nature of magick and "coincidence"?.
There are many examples of coincidence, some simple, such as bumping into someone you know at an unexpected destination, others can be a little more complex and harder to explain. A few months ago the artist friend of mine "John Fisher" became obsessed with painting dragons, as it was his coming birthday his son decided he would try to find him a good resource book of dragon artwork, so he went the local bookshop and enquired if they had such a book in stock, a few moments later the sales assistant returned with a huge volume of dragon art, exactly what he'd been looking for, on opening the book he discovered that it had been compiled by an artist named "John Fisher!", the artist son is a true sceptic, but knowing that I have an interest in these matters decided to tell me of his experience.
The above example could be just put down to a simple if strange case of coincidence, but what if there is some form of deeper activity going on?, could it be that reality was telling John to carry on drawing dragons, or that he was wasting his time and to give up as it had already been done?.
It is my opinion that there is no such thing as coincidence, I believe that coincidences are signs written into the fabric of reality that if fully understood help to guide our lives in one direction or another.
So we come to the subject of "can we prove that magickal activity created a desired result?". skeptics will tell you that the results created by magickal activity are almost impossible to prove and the term coincidence will once again rear is ugly head, but if we take a more scientific approach to the subject it may become possible to validate our work.
If we take the time to stringently record our objectives, such as "money", and then record the exact details of the ritual, such as the time and date it was carried out, weather conditions, movement of the moon, along any other fine details that may effect the ritual, such as state of mind, diet etc, we can then wait for a given period of time for the result to manifest, and yes, if the money manifests it could still be put down to "coincidence", but if we then repeat the ritualistic experiment under exactly the same conditions and we get a result within the same time set period of time it then reinforces the notion that our activity has indeed created that result.
If we carry this further and repeat the ritual on several occasions and yet again produce a positive result we come to the the position where we can calculate coincidence against probability, the sceptics will still maintain their opinion but the argument towards the result being created via our magickal activity has shifted in our favour.
This is why we should try to keep as precise a record as we can of all that we are working towards, it gives us the option to check, re-check and evaluate our personal progress or failures.
On a higher level, we can learn to read the hidden meaning of the signs and "coincidences" that effect our daily lives, rather then taking the experienced "coincidences" at face value, we should try to decipher their intended effects upon the destiny of our lives.