Mishnah Berurah — משנה ברורה

The meaning of the words - like the Rabbis say (Berakhot 47) that one should not "throw" a blessing from his mouth, rather he should concentrate when saying it and make the blessing calmly. And this is the language used in the Sefer Chasidim siman (chapter) 46: When one washes his hands, or recites a blessing on a fruit or on [any of the] mitzvot which are constantly in the mouth of people (ie. which they are accustomed to say), he should direct his heart towards his Creator, Who does wondrous kindness to him, and gave him the fruit or bread to benefit from, and commanded him to perform the mitzvot. And he should not act like an individual who does things out of habit and lets words leave his mouth without any thought. Regarding this Hashem becomes angry at his people and he sent to us in the hand of Isaiah and said (Isaiah 29:13) "Since this people draw near, and with their mouth and with their lips do honour me, but have removed their heart far from me" And see further there (ie. in Sefer Chasidim) where he speaks at length about the great punishment regarding this.