εἰς
Into, towards, within
εἰς is used only with the accusative case. It is used more than seventeen hundred times in Scripture. Its primary use is to denote entrance or direction towards. Its remote meanings include in the sphere of, against, upon, and causal. Purpose or result are derived when εἰς used with an infinitive.
εἰς is commonly used to express entrance or direction towards.
When the Magi from the east came into the house where the young Christ child resided, they worshipped Him (Matthew 2:9).
Those who keep the Messiah’s words would not see death into the age (John 8:51).
God the Father sent His Son into the world (John 3:17).
Tongues are unto a sign, not for those who believe, but for the unbelievers (1 Corinthians 14:22).
Peter and John fix their eyes towards a lame man begging for alms (Acts 3:4).
εἰς may denote sphere, or location.
The slave does not abide in the house into the age, where the Son abides into the age (John 8:35).
Go in peace (Luke 8:48).
When εἰς is used with a plural, it expresses among.
The saying went out among the brethren that the disciple, John, would not die (John 21:23).
εἰς may express against, or contrary to.
Anyone speaking a word against the Son of Man (Luke 12:10).
If a brother sins against you (Matthew 18:15).
The carnal mind is against God (Romans 8:7).
εἰς may be used to express reference towards.
Christ is an end unto (with reference to) righteousness to all who believe (Romans 10:4).
Wise concerning what is good and simply with reference towards wrong (Romans 16:19).
εἰς may denote equivalence.
I will be to him as a father (Hebrews 1:5).
Having received the law as from messengers (Acts 7:53).
εἰς may express cause
I indeed immerse because of a change of mind (Matthew 3:11).
Abraham did not waver because of the promise of God (Romans 4:20).
Immersion because of the sending away of sin (Acts 2:38).
The men of Nineveh changed their minds because of the preaching of Jonah (Matthew 12:41).
The heart believes because of righteousness, and verbal agreement is made because of salvation (Romans 10:9).
When εἰς is used to express purpose, it is primarily used with the infinitive.
When the brethren meet for the purpose of eating, they are to wait upon each other. If someone cannot wait due to hunger, let him eat at home (1 Corinthians 11:33).
Paul came to Troas with the purpose of evangelizing the Christ (2 Corinthians 2:12).
I long to see you for the purpose of establishing you (Romans 1:11).