to original question:
yes, if you are willing to leave everything that pulls you away from God (riches, comfort, pride, lust, rebellion etc), rely totally on the grace given to us by God through the death and resurrection of God the Son and if you chase (seek) to be close to God above all other things.
in the oriental orthodox churches, theosis is taught as something we should attain (to answer father irish hermit), but the word 'theosis' is not usually used because we don't come across it often in the english translations of the oriental orthodox fathers.
we talk about partaking in the divine nature (2 peter 1 verse 4) without using the term 'theosis' as used by the greek and slavic fathers. it is our highest aim to become so disconnected from the love of the world that we radiate God's love to all things (people and animals) around us. this achieved through partaking in the sacrements, through a dynamic relationship with God, through extreme humility (really emphasized in the coptic church - we believe in it; we don't all have it!) and through meditating on the glory of God.
those copts who are educated in the catholic and eastern fathers do sometimes talk about achieving 'theosis' or 'deification'. they mean the same thing as i outlined above.
we meditate on the psalms, pray the 'our Father' prayer often and take time to always pray God.
i used to know someone who seemed to have achieved this state. i met him while he was undergoing treatment for a brain tumour that later, eventually killed him. despite his suffering, he was whispering to himself 'thank you God' all day, and when asked about his health replied 'we thank God for His goodness to us, that today i am a little better'.
just being in the same room with him, a person could feel the love of God radiating from him. this is how i want to be, and i pray we can all achieve this deep relationship with God.