This is not true, Joseph smith in D&C 9:5-9
8 But, behold, I say unto you, that you must study it out in your mind; then you must ask me if it be right, and if it is right I will cause that your bosom shall burn within you; therefore, you shall feel that it is right.
9 But if it be not right you shall have no such feelings, but you shall have a stupor of thought that shall cause you to forget the thing which is wrong; therefore, you cannot write that which is sacred save it be given you from me.
HUH? How do you mange to SKIP right over what your own Living Prophet® had written??
5 And, behold, it is because that you did not continue as you commenced, when you began to translate, that I have taken away this privilege from you.HUH? How do you mange to SKIP right over what your own Living Prophet® had written??
6 Do not murmur, my son, for it is wisdom in me that I have dealt with you after this manner.
7 Behold, you have not understood; you have supposed that I would give it unto you, when you took no thought save it was to ask me.
8 But, behold, I say unto you, that you must study it out in your mind; then you must ask me if it be right, and if it is right I will cause that your bosom shall burn within you; therefore, you shall feel that it is right.
9 But if it be not right you shall have no such feelings, but you shall have a stupor of thought that shall cause you to forget the thing which is wrong; therefore, you cannot write that which is sacred save it be given you from me.