Many of us tent tend  to get disappointed when things don't work quite as we want them too.   We start a diet and quit a few weeks later because we think we are not loosing weight fast enough.  Or we loose weight one week and don't loose any the next, so we quit trying (I've been guilty of that one).  We join a health club, then give up a month or two later because we haven't gained enough muscle.  We try to learn another language, but quit because we are finding it harder than we expected.  These are all understandable, but we need to learn that the people who succeed in life are those who don't become disappointed and give up very easily.
    The same is true for those trying to develop their spiritual side.  Often we think we haven't accomplished anything and give up trying.  We shouldn't.  For one thing, we may have actually accomplished a lot more than we think we have, we are just not aware of it.  We may think nothing has changed, but a person who has the ability to see our energy centers or our aura may see that our chakras are stronger and our aura is more vibrant and balanced.  We may be able to solve problems a little better than we used to, but we don't realize it.  We may be better able to control our temper.  In short, the changes we see externally are very subtle and likely to not be noticed so don't quit your spiritual studies because you think they have had no effect.  They always have an effect but it may take a while for the effect to be enough for you to notice.