Musar su Salmi 92:6

As far as the emanation כתר is concerned, (usually perceived as the highest and tenth), this has to be perceived as the "crown" of the structure; the קוצו של י would symbolise that כתר, as explained by the Kabbalists. They view this "point" of the letter Yud as the closest we can come to portray the invisible world of the ten emanations, whereas they view the Yud when spelled fully, as a word as symbolic of our visible world, i.e the emanations after they have become functional in our world. Each emanation is perceived as embodying all three aspects of the letter י. The attribute א-ד-נ-י which is the mystical dimension of the "celestial" ארץ, [parallel to the ארץ of our world, Ed.] "receives" these emanations. [When you spell א-ד-נ-י in words i.e. אלף-דלת-נון-יוד, the numerical value is 671 or the same as the Targum of the word שער, i.e 1+ תרע for the word itself. Ed.] When you consider that תרומת מעשר is actually מעשר מן המעשר, one tenth of a tenth, and that the word מעשר means something like מ-שער "from the gate," you have an inkling of the סוד, mystery, of how the blessings are related to מאה שערים.