Examples of using It is not difficult to understand in English and their translations into Portuguese
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                        Colloquial
                    
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                        Official
                    
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                        Medicine
                    
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                        Financial
                    
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                        Ecclesiastic
                    
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                        Ecclesiastic
                    
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                        Computer
                    
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                        Official/political
                    
with its close encounters between extreme wealth and poverty, it is not difficult to understand why EoC was  born there not  by chance.
It is not difficult to understand that the agents of this chain(farmers,
And when all of this is  taken into consideration, it is not difficult to understand how these men came to  preach a new gospel about Jesus in the place of their former message of the fatherhood of God
Before coming, Jesus sent to  Earth a host of missionaries It is not difficult to understand that the coming of Jesus among us involved intense work by all those Spirits called to  share with Him His glorious mission.
In face of this, it is not difficult to understand that the socio-economic conditions of Latin America provide a fertile ground to  the expansion of Mao's anti-Marxist"theories" within the ranks of the impoverished Latin American workers.
It is not difficult to understand how important a stimulus the occasion of the Eucharistic Year should be  for advancing research of the theme of how the Eucharist has been  able, and remains capable of strongly influencing human culture.
Regarding limited resources(whatever that is  what is  meant by resources), it is not difficult to understand that if it is  important to  plan the use of what is(or seems to be) 
Nowadays, after 152 years since the publication of The Mediums' Book, it is not difficult to understand the reason of the transcribed recommendation above,
Breadmaker machines have become enormously popular in recent years and it is not difficult to understand why, when you can simply pop in the ingredients
As the final purpose of every bourgeoisie is to  maximize profits, it is not difficult to understand why the Chinese bourgeoisie struggled to  control state power
effort of moralization of the individual and his/her habits; it is not difficult to understand that faith in the future life,
Europe's external trade and close to  40% of its internal trade passes through its ports, it is not difficult to understand the great challenge that Europe's ports face if they are to  deal with increasing demand.
It is not difficult to understand why our planet continues to be, 
It is not difficult to understand that without understanding and respect,
cyclical because of capital inflows, it is not difficult to understand that the exchange rate works as a sort of light switch that«turns off»
It is not difficult to understand that the struggle of the present opposition in the Socialist Workers Party has nothing in common with the struggle of the Russian opposition of 1923 against the privileged bureaucratic caste
It is not difficult to understand that the fight against this conciliatory tendency is  an integral part of the general fight against the Right deviation,
Taking a somewhat reflective attitude to  the question, it is not difficult to understand, for example,were incomparably more"spontaneous"- that is,  thoughtless, sheeplike, blind- than the"disorganised" peasant campaigns agaoinst the landlord, where each peasant knew quite well what he wanted.">
Taking a somewhat reflective attitude to  the question, it is not difficult to understand, for example,were incomparably more"spontaneous"- that is,  thoughtless, sheeplike, blind- than the"disorganised" peasant campaigns against the landlord, where each peasant knew quite well what he wanted.">