The Hebrew word signifies, to prevent or keep off any evil with which we are threatened. The direction ought to extend to all that we do; for not one duty can be rightly performed without diligent attention, and it is no less incumbent upon us than upon the king and people of Judah (H. E. I. 4880-4890). It is a necessary and useful caution, which ought to be reduced to practice at all times, especially in seasons of perplexity and distress, such as that wherein Ahaz and his subjects received this admonition. 1. Take heed to your _senses,_ particularly what you see and hear; for these are the avenues by which sin and vanity, or wisdom and instruction, enter into the heart (H. E. I. 4895). 2. Take heed to your _actions,_ what you do, and how you act, and for what purpose you are employed, that you may happily avoid the many sins and dangers to which you are exposed, and attain the great ends which you ought uniformly to pursue. 3. Take heed to your _tongue,_ that you sin not with your mouth; consider wisely what you say, to whom you speak, and to what purpose, especially when your minds are fretted, and when you feel yourselves under the influence of timidity and disappointment (P. D. 3558, 3559). 4. Take heed to your _hearts,_ and keep them with all diligence, for out of them are the issues of life; attend to the secret operations of your minds, and the objects on which your affections terminate, that you may perceive whether they are properly moderated and directed (H. E. I. 2695-2705, 4887; P. D. 1735).--_Robert Macculloch: Lectures on Isaiah,_ vol. i. p. 395. FAITH, THE CONDITION OF FIRMNESS. vii. 9. _If ye will not believe, surely ye shall not be established._ "Established" is what every man wishes to be--fixed in fact and in feeling; established like a great oak which, because its roots take fast hold of the soil, is able to grow broader and higher and more luxuriant year by year. Such growth is impossible to a tree that is frequently transplanted. Notwithstanding--nay, in perfect harmony with the desire for progress that is in us all, we all desire to be "established." But no man can be "established" unless he believes. It is a universal law: No faith, no firmness. There are two things essential to "establishment," to blessedness and peace in life: First, that we should find a good foundation, and then that we should rest upon it calmly and immovably. These are the conditions of social, commercial, political, and scientific blessedness and prosperity. In every realm of human activity, if we would be strong in fact and in feeling, it is essential that we should find something trustworthy, and then that we should trust (H. E. I. 1882-1888).