Jesus promised his disciples that ‘they would receive power when the holy spirit arrived upon them.’ The terms “power” and “spirit” are distinct in their meaning. God’s spirit, his active force, describes energy that is projected and exerted on people or things to accomplish God’s will. Power, however, can be defined as the “ability to act or produce an effect.” It can lie dormant in someone or something until it is needed to produce a given result. Thus, holy spirit might be likened to the electric current that energizes a rechargeable battery, whereas power is more like the latent energy that is then stored in the battery. The power that Jehovah grants to his servants by means of holy spirit gives each one of us the ability to fulfill our Christian dedication and, when necessary, to resist negative forces that are exerted upon us.—Read Micah 3:8; Colossians 1:29.
Holy spirit—the dynamic force behind creation. We owe our existence to Jehovah’s use of this spirit to produce all his works.—Job 33:4; Ps. 104:30.
What, then, is the true nature of holy spirit? A footnote at Genesis 1:2 in the New World Translation of the Holy Scriptures—With References states: “Besides being translated ‘spirit,’ ru′ach [Hebrew] is also translated ‘wind’ and by other words that denote an invisible active force.” (Compare footnotes at Genesis 3:8; 8:1.) Just as wind is invisible but exerts force, so the immaterial, impersonal holy spirit is unseen but produces effects. This spirit is energy from God projected and exerted on people or things to accomplish his will.
Jehovah did not create us with the ability to do that for ourselves, especially not in our imperfect condition. His prophet Jeremiah wrote: “O Lord, I am conscious that a man’s way is not in himself: man has no power of guiding his steps.” (Jer. 10:23, The Bible in Basic English) And why not? Jeremiah heard God’s analysis of why we are impaired when it comes to directing ourselves. Speaking of the person we are inside, Jehovah said: “The heart is more treacherous than anything else and is desperate. Who can know it?”—Jer. 17:9; Matt. 15:19.
If we are humble and willing to depend on Jehovah, he will impart to us his holy spirit as a sure guide for our steps. How will that active force help us? Jesus explained to his disciples: “The helper, the holy spirit, which the Father will send in my name, that one will teach you all things and bring back to your minds all the things I told you.” (John 14:26) As we regularly and prayerfully study God’s Word, including all the sayings of Christ, holy spirit will increase our comprehension of Jehovah’s deep wisdom, so that we can follow his will closely. (1 Cor. 2:10) Additionally, at any unexpected turn in the road to life, the spirit will show us the way to go. It will bring to mind Bible principles that we have already learned and help us to grasp how they apply in directing our next step.
Greek word for “conscience” literally means “co-knowledge, or knowledge with oneself.” Unlike all other earthly creatures, we possess a God-given capacity to know ourselves. We can, in a sense, stand back and look at ourselves and make moral judgments. Acting as an internal witness bearer, or judge, our conscience can examine our actions, our attitudes, and our choices. It may guide us toward a good decision or warn us against a bad one. Afterward, it may comfort us for choosing well or punish us with sharp pangs for choosing poorly.
This faculty was built into man and woman from the very beginning. Adam and Eve each showed that they had a conscience. We see evidence to that effect in the shame they experienced following their sin. (Genesis 3:7, 8)
The conscience may in some cases be wrong. Why? Well, if a compass is placed near a metal object, it may be influenced to point in a direction other than north. And if it is used without an accurate map, the compass may be nearly worthless. Similarly, if unduly influenced by the selfish desires of our heart, our conscience may point us in the wrong direction. And if it is used without the sure guidance of God’s Word, we may be unable to distinguish between right and wrong in many important matters. Really, in order for our conscience to work properly, we need the guidance of Jehovah’s holy spirit. Paul wrote: “My conscience bears witness with me in holy spirit.” (Romans 9:1) How, though, can we make sure that our conscience is in harmony with Jehovah’s holy spirit? It is a matter of training.
The Bible; jw.org